flatbed的复数形式怎么写

All girders shipped by rail were arranged on a flatbed rail car.由火车装运的所有主梁都安放在平板火车车皮上.He took away our big color television on a flatbed tricycle.他用平板车拉走了我家的大彩电.Scanning equipment, flatbed scanners fanwei desktop drum sc...

flatbed的音标：flatbed的英式发音音标为：['flætbed]flatbed的美式发音音标为：['flætˌbɛd]...

n.有平台可装货的卡车（拖车）...